But former England defender Keown believes Mourinho has got it wrong with his approach to both players.

"Since he took charge at Old Trafford at the end of May, Mourinho has not been afraid of criticising his players and he is clearly the kind of manager who is not afraid to fall out with them," Keown told BBC Sport.

"Mourinho has worked out that some of the players who were out of favour can play a key role for him, even if others like Anthony Martial and Luke Shaw are yet to win him over.

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Luke Shaw has not featured regularly under Jose Mourinho at Manchester United this season

"He is the manager and he has to go with his instincts when he decides which players he thinks he can get more out of, or he does not think are giving enough.

"I do feel he has got it wrong with Martial, and Shaw as well, but there is still a way back for them."

Keown cited the example of Bastian Schweinsteiger, who returned to the United bench against West Ham, as evidence that Shaw and Martial can recover under Mourinho.

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Anthony Martial has struggled for form at Manchester United since last season

"Mourinho has already shown that he will allow you back into the fold if you react the way he wants you to, and there are not many players in his squad who can say they have not had an opportunity under him," Keown added.

"He named Bastian Schweinsteiger in his squad for the first time on Sunday, although he did not get off the bench, so Mourinho is clearly willing to keep trying things too.

"I think he will get it right but, to make the top four and get back into the Champions League, it has to happen soon otherwise they are going to be even further off the pace."